EP1880039A2 - Enamel coating for liquid application - Google Patents
Enamel coating for liquid applicationInfo
- Publication number
- EP1880039A2 EP1880039A2 EP06753525A EP06753525A EP1880039A2 EP 1880039 A2 EP1880039 A2 EP 1880039A2 EP 06753525 A EP06753525 A EP 06753525A EP 06753525 A EP06753525 A EP 06753525A EP 1880039 A2 EP1880039 A2 EP 1880039A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- binder
- einschmelzschlicker
- powder
- mixed
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 15
- 239000002320 enamel (paints) Substances 0.000 title 1
- 238000000576 coating method Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims 1
- 229910001092 metal group alloy Inorganic materials 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
- B23K35/025—Pastes, creams, slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major constituent
Definitions
- the present invention initially relates to a method for coating objects, in particular made of metal, such as workpieces or machine parts with a metallic smelting alloy.
- the invention also relates to the composition, in particular for the stoving coating of metallic objects and the coated articles themselves.
- the object of the invention is, on the one hand, to provide a method which can be implemented inexpensively with simple means, with which objects of complex geometry can be coated quickly and in bulk.
- the basic idea of the invention is ultimately to bring a molten alloy present in powder form into a flowable or spreadable state at the processing temperature, in which it adheres-at least for a certain time-to the article to be coated .
- the powder is mixed with a binder and, if the binder has not already provided a liquefaction, mixed with the addition of a liquid to a Einschmelzschlicker the desired viscosity.
- the viscosity can be in a range between more or less liquid and pasty.
- This Einschmelzschlicker may then by a simple process, for example in a dipping bath or a brush or spraying process, at moderate temperatures, in particular at room temperature below 50 0 C, are applied to the article.
- the article provided with the meltdown slip subsequently becomes high Temperatures, in particular over 1000 0 C, exposed, which allow the melting of the Einschmelzleg réelle.
- various objects, such as workpieces or machine components, coated, with metal objects are particularly preferred and ceramic items are not excluded.
- a very significant advantage of the invention lies first of all in the fact that the layer application can be carried out by simple application methods such as dipping, brushing or manual spraying with the aid of compressed air. With one of these methods, the slurry is applied to the object to a certain extent, with thicknesses of more than 0.5 mm are possible.
- the baking process follows. Since the coating material is applied as easy-to-process slip, can be dispensed with the above-mentioned complex coating equipment, which is associated with a significant cost savings.
- the process can be used to produce layers with a high hardness of more than 60 HRC and layer thicknesses of less than 100 ⁇ m to more than 1 mm.
- the surfaces coated in this way have a high resistance to abrasive stress and yet sufficient ductility. In addition, the surfaces have an increased corrosion resistance.
- the melting slip is applied to the object by means of a dipping process, this can take place in one or more dipping steps, wherein the thickness of the applied slip can be controlled by the number of dipping steps.
- Another advantage of the invention is that the melt-down at temperatures below 100 0 C, especially at room temperature, can be applied to the article.
- the slurry wets the entire surface of the object already at the time of application but at the latest when heating, so that even geometrically difficult components with undercuts are coatable.
- the slip can be designed in such a way that it spreads over the entire surface at the latest when heated and until it solidifies the alloy is liable.
- the viscosity of the Einschmelzschlickers is adjusted by adding the liquid to the respective requirements, so that it does not drip completely from the workpiece to be coated during processing.
- any substance can be used with which the components form a suspension substantially.
- alcohols and especially water are suitable for this purpose, with water being of particular advantage because of the low cost.
- the invention also relates to a composition which is particularly suitable for baking coating metallic objects.
- This comprises, as components, first of all a metal melamine alloy present as a powder and a binder which, depending on the type of binder, accounts for more than 1% or more than 5%, in particular more than 10%, and no more than 50% of the total mass %, contributes.
- pulverulent NiCrBSi alloys as used in other coating methods, are of particular advantage as a fused alloy.
- sintering begins, which forms a stable structure at temperatures above 500 ° C. Above this temperature, the NiCrBSi alloy forms a viscous solder. From the specified temperature range of more than 500 ° C results as an essential requirement for the binder that it is also resistant to this temperature range.
- binders for the invention which are readily miscible with the Einschmelzlegierung and which are stable at temperatures above 400 0 C, in particular up to about 600 0 C.
- the binder essentially serves to provide initial adhesion between the metal powder particles to one another and to the substrate, even on sloping surfaces to ensure.
- the binder must have a thermal resistance up to a temperature range in which use the bonding and adhesion processes of the metal powder particles, which is the case at about 600 0 C.
- the binder in the melted state does not significantly or even negatively affect the crystal structure of the melted alloy.
- the binder may either no longer be present in the completely baked-on coating or be present in such an amount and distribution that it does not adversely affect the desired properties of the coating.
- the binder reacts with the metal and enhances the desired properties of the coating.
- the binder may also be a multi-component composition which together contribute to the desired characteristic.
- two substances are suitable as binders or as components of the binder:
- First enamel in powder form is mentioned as a binder, the production of enamel, which is present in the raw material as a so-called frit, has been known for a long time.
- the frit is ground into a powder having a grain size such as between flour and sugar. Tests have shown that enamel is particularly suitable as a binder for the composition.
- Enamel is advantageously used with a mass fraction of about 5% and more.
- inorganic adhesives which are temperature resistant up to about 500 0 C, in particular up to about 600 0 C and in particular vermallen to a powder before they are mixed with the particles of Einschmelzleg réelle.
- adhesives may also be in liquid form, which can be added directly to the smelting alloy.
- These adhesives are advantageously used in a mass fraction of about 2% and more. Due to these requirements, an enamel is used as the binder, which, as an independent layer, has many of the required properties. With appropriate composition of the mixture, a smooth coating with metallurgical adhesion to the base material and high hardness can be set.
- the applied coating has a metallurgical bond of high adhesion to the base material.
- the benefits of the coating can be exploited primarily by users who require hard wearing coatings in thick film with a removal reserve and no thin films.
- a general requirement of the composition is that, at the latest with the addition of liquid, it forms a slip in which the individual components are present side by side substantially in a suspension, without unwanted chemical reactions taking place.
- further particles such as ceramic or hard metal particles, are added to the composition, which modify the nature and the characteristics of the coated surface.
- a metal powder consisting of an alloy of the system NiCrBSi or a similar Einschmelzlegleiter mixed with enamel powder and stirred with water to a slurry.
- the two powders are in a mixing ratio of 75% by mass of metal powder to 25% by mass of enamel powder.
- the water is added as needed.
- the slurry is applied to the steel component in a thickness of 1 mm and melted at a temperature of 1025 0 C.
- the resulting layer has a hardness of 620 HV5.
- the frit Wendel MW7526 is used as an enamel.
- metal powder consisting of an alloy of the system NiCrBSi or a similar Einschmelzlegierung with an adhesive, which is present in particular in powder form, mixed and stirred with water according to the adhesive manufacturer to a slurry.
- the two powders can be in a mixing ratio of 95% by mass of the metal powder to 5% by mass of the adhesive.
- the slurry is applied to the steel component in a thickness of 1 mm and subsequently melted at a temperature of more than 1025 0 C.
- the resulting layer has a hardness of more than 680 HV5.
- As an adhesive the type Panacol TM, Cerestil TM C7 can be used.
- melts used for flame spraying can be used.
- An overview of the typical compositions with their melting temperatures can be found in the table below (according to Simon / Thoma, Applied Surface Technology for Metallic Materials, Carl Hanser Verlag, Kunststoff, Vienna, 1989).
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510022264 DE102005022264A1 (en) | 2005-05-10 | 2005-05-10 | Liquid coatable baking coating |
PCT/EP2006/004323 WO2006119962A2 (en) | 2005-05-10 | 2006-05-09 | Enamel coating for liquid application |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1880039A2 true EP1880039A2 (en) | 2008-01-23 |
EP1880039B1 EP1880039B1 (en) | 2014-11-26 |
Family
ID=36869864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06753525.2A Active EP1880039B1 (en) | 2005-05-10 | 2006-05-09 | Enamel coating for liquid application |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1880039B1 (en) |
DE (1) | DE102005022264A1 (en) |
WO (1) | WO2006119962A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011108807A1 (en) | 2011-07-29 | 2013-01-31 | Fachhochschule Münster | Method for producing a component of a closing device |
DE102011110633A1 (en) | 2011-07-29 | 2013-01-31 | Fachhochschule Münster | Method for applying a protective layer for protection against impact loads |
DE102013221737A1 (en) * | 2013-10-25 | 2015-04-30 | Ford Global Technologies, Llc | Method for producing a brake disk and brake disk |
DE102015212511B4 (en) | 2014-07-24 | 2019-06-06 | Ford Global Technologies, Llc | Method for producing a brake disk and brake disk |
DE102014113425A1 (en) | 2014-09-17 | 2016-03-17 | Fachhochschule Münster | Method for coating an article |
DE102016214556A1 (en) | 2016-08-05 | 2018-02-08 | Bayerische Motoren Werke Aktiengesellschaft | A method of forming an enamel coating on a vehicle component, vehicle component with enamel coating and use |
DE102016116886A1 (en) | 2016-09-08 | 2018-03-08 | Fachhochschule Münster | Method for producing a metallic base body provided with a protective layer |
DE102020123457A1 (en) | 2020-09-09 | 2022-03-10 | Fachhochschule Münster | Process for applying a protective coating to a workpiece |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1921313U (en) * | 1962-02-16 | 1965-08-12 | Oberschwaeb Metallwaren | ENAMELLED STEEL VESSEL FOR COOKING, ROASTING OR BAKING. |
GB1384890A (en) * | 1970-09-04 | 1975-02-26 | Rockwell International Corp | Protective coatings for ferrous metals |
EP0013906B1 (en) * | 1979-01-17 | 1982-06-23 | Bayer Ag | Coated metal article and method of manufacturing it |
DE3405768A1 (en) * | 1984-02-17 | 1985-08-22 | Asta Ullrich GmbH Annweiler am Trifels, 6747 Annweiler | Enamelled metal sheet |
US4971856A (en) * | 1987-05-07 | 1990-11-20 | Arthur Karp | Microwave components with a surface coating which imparts a very high RF loss |
DE3715325A1 (en) * | 1987-05-08 | 1988-11-24 | Castolin Sa | METHOD FOR PRODUCING SLIDING SURFACES ON PARTS OF VEHICLE ENGINES |
CH684196A5 (en) | 1991-05-30 | 1994-07-29 | Castolin Sa | Wear-resistant layer on a component and to processes for their preparation. |
CN1097816A (en) * | 1993-07-19 | 1995-01-25 | 辽宁省铁岭阀门厂 | Surface intensifying treatment method for high corrosion-resistance wear-resistance oil pump |
DE19727375C1 (en) | 1997-06-27 | 1999-03-18 | Heye Hermann Fa | Process for producing a hard layer on tools, use of a device for carrying out the process and press ram and level for the production of hollow glass |
DE19948701C2 (en) * | 1999-10-06 | 2003-05-08 | Inst Energetik Und Umwelt Ggmb | Process for the formation of wear protection layers on surfaces and apparatus for carrying out the process |
-
2005
- 2005-05-10 DE DE200510022264 patent/DE102005022264A1/en not_active Ceased
-
2006
- 2006-05-09 EP EP06753525.2A patent/EP1880039B1/en active Active
- 2006-05-09 WO PCT/EP2006/004323 patent/WO2006119962A2/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006119962A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006119962A2 (en) | 2006-11-16 |
EP1880039B1 (en) | 2014-11-26 |
WO2006119962A3 (en) | 2007-03-22 |
DE102005022264A1 (en) | 2006-11-16 |
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